const http = require('http');
const hostname = '127.0.0.1';
const port =3000;
const server = http.createServer((req,res) => {
	res.statusCode = 200;
	res.setHeader('Content-Type','text/plain');
	res.end('Hello World\n');
});
server.listen(port,hostname,()=>{
	console.log("服务器运行在 http://${hostname}:${port}/");
});
